BioChem - DOS

Evaluation of an integrated biorefinery based on fractionation of spent sulphite liquor for the production of an antioxidant-rich extract, lignosulphonates and succinic acid

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Alexandri, Maria; Papapostolou, Harris; Komaitis, Michael; Stragier, Lutgart; Verstraete, Willy; Danezis, Georgios P.; Georgiou, Constantinos A.; Papanikolaou, Seraphim; Koutinas, Apostolis A.

<P><B>Abstract</B></P> <P>Spent sulphite liquor (SSL) has been used for the production of lignosulphonates (LS), antioxidants and bio-based succinic acid. Solvent extraction of SSL with isopropanol led to the separation of approximately 80% of the total LS content, whereas the fermentations carried out using the pretreated SSL with isopropanol led to the production of around 19g/L of succinic acid by both <I>Actinobacillus succinogenes</I> and <I>Basfia succiniciproducens</I>. Fractionation of SSL via nanofiltration to separate the LS and solvent extraction using ethyl acetate to separate the phenolic compounds produced a detoxified sugar-rich stream that led to the production of 39g/L of succinic acid by <I>B. succiniciproducens</I>. This fractionation scheme resulted also in the production of 32.4g LS and 1.15g phenolic-rich extract per 100g of SSL. Both pretreatment schemes removed significant quantities of metals and heavy metals. This novel biorefinery concept could be integrated in acidic sulphite pulping mills.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Two biorefinery schemes based on sulphite pulping mills were evaluated. </LI> <LI> Fractionation of SSL was achieved via nanofiltration and solvent extraction. </LI> <LI> An antioxidant-rich extract was produced via solvent extraction with ethyl acetate. </LI> <LI> Solvent extraction with isopropanol led to significant removal of heavy metals. </LI> <LI> 39g/L succinic acid were produced from filtrated-extracted SSL. </LI> </UL> </P>

2016

Elsevier

0960-8524

214

pp.504-513

10.1016/j.biortech.2016.03.162

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART75722544

Spent sulphite liquor; Integrated biorefinery; Lignosulphonates; Antioxidants; Succinic acid